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| author | Omar Sandoval <osandov@fb.com> | 2018-05-09 02:08:53 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-09 08:33:09 -0600 |
| commit | 522a777566f5669606a1227bf13f3fb40963780b (patch) | |
| tree | 7d37c9d591e5a9abb4fd1209f1c503ae1a0e8475 /block/bfq-iosched.c | |
| parent | 4bc6339a583cec650b05d6fdcc83f03f941c1a3b (diff) | |
| download | lwn-522a777566f5669606a1227bf13f3fb40963780b.tar.gz lwn-522a777566f5669606a1227bf13f3fb40963780b.zip | |
block: consolidate struct request timestamp fields
Currently, struct request has four timestamp fields:
- A start time, set at get_request time, in jiffies, used for iostats
- An I/O start time, set at start_request time, in ktime nanoseconds,
used for blk-stats (i.e., wbt, kyber, hybrid polling)
- Another start time and another I/O start time, used for cfq and bfq
These can all be consolidated into one start time and one I/O start
time, both in ktime nanoseconds, shaving off up to 16 bytes from struct
request depending on the kernel config.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.c')
| -rw-r--r-- | block/bfq-iosched.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index 771ae9730ac6..ebc264c87a09 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -4778,8 +4778,8 @@ static void bfq_finish_requeue_request(struct request *rq) if (rq->rq_flags & RQF_STARTED) bfqg_stats_update_completion(bfqq_group(bfqq), - rq_start_time_ns(rq), - rq_io_start_time_ns(rq), + rq->start_time_ns, + rq->io_start_time_ns, rq->cmd_flags); if (likely(rq->rq_flags & RQF_STARTED)) { |